Here is an interesting perfume or scent bottle. It is made of cobalt blue glass. The glass appears wavy, possibly from a mold. The vial has 8 sides and a pointed tip. It also has a brown plastic, possibly bakelite, screw-on top. Inside the cap are the letters and numbers: "SIO 56 B" in a circle. The cap has a ridge on the top with a small hole, possibly for attaching to a chatelaine or other object. The overall length of the piece with the top is approximately 3-1/8" long X 1/2" wide. It is in very good condition.